<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>动态组件和v-once指令</title>
    <script src="./js/vue.js"></script>
</head>
<body>
    <div id="root">
        <!-- 使用普通方法 -->
        <!-- <child-one v-if="type === 'child-one'"></child-one>
        <child-two v-if="type === 'child-two'"></child-two>
        <button @click="handleBtnClick">toggle</button> -->
        <!-- 使用动态组件 -->
        <component :is="type"></component>
        <button @click="handleBtnClick">toggle</button>
    </div>
    <script>
        Vue.component('child-one',{
            template: `<div v-once>child-one</div>`
        });
        Vue.component('child-two',{
            template: `<div v-cone>child-two</div>`
        });
        var vm = new Vue({
            el: "#root",
            data: {
                type: 'child-one'
            },
            methods: {

                handleBtnClick: function(){
                    this.type = this.type === 'child-one' ? 'child-two' : 'child-one';
                }
            }
        });
    </script>
</body>
</html>